Gas Octane

[RT NOMAD]

What are the experts opinions on the pros and cons of using 93 octane fuel vs the OEM recommended 89 octane.

Thanks for any advise,
Terry

[matt]

Not an expert, but I tried both 93 and 89 and belive the 89 is the best.

good luck.

[lilguyhemi]

I am using 89 octane as stated in the owners manual and have had no problems. Using 93 will do nothing to improve the operation of the Magnum, it will only cost you more.

[snickle]

On an un-mod'ed engine, under reasonable tempature, I can't see 93 helping. In hot areas, I see it helping if you are pushing the car hard. Reada that WOT.

As we start making significant mods, it may come INTO play.

[schmeky]

lilhemiguy,

Octane is based on compression ratio (CR) and ignition efficiency of your engine. The stock CR is 9.6:1 (based on memory) and the hemi uses twin plug high voltage (60,000+) ignition. DCM will not recommend the wrong fuel for your engine. 89 octane is optimal and even regular would most likely be OK under light LOAD moderate temperature conditions.